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Sorghums in the Post-Rainy Season. I. Effect of Irrigation and Date of Sowing on the Grain and Stover Yields of Diverse Cultivars†

Published online by Cambridge University Press:  03 October 2008

Belum V. S. Reddy ,
N. Seetharama  and
L. R. House
Belum V. S. Reddy
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, PO 502 324, AP, India
N. Seetharama
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, PO 502 324, AP, India
L. R. House
Affiliation:
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, PO 502 324, AP, India
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Summary

In India, sorghum is grown during the post-rainy season on Vertisols with stored soil moisture. As water stress towards the end of the growing season is believed to be a major cause of poor yields in these crops, an experiment was carried out involving five sorghum genotypes and four sowing dates with and without irrigation.

Supplementary irrigation with 40 mm of water in the earliest sown crop increased grain yields by 24 and 26% in 1979 and 1982, respectively, while irrigation with a total of 120mm water in the latest sown crop increased yields by 87 and 60% compared with the corresponding dryland crops. Early sowings always resulted in better stover and grain yields irrespective of irrigation treatment. Grain yields of hybrids were similar to those of the cultivars but their stover yields were less. The post-rainy season cultivar SPY 86 gave the best grain yield across sowing dates. The widely grown post-rainy season cultivar M 35–1 yielded less but produced more stover and its yields were more stable. The importance of the stability of grain and stover yields and of evaluating the materials for more than one date of sowing in selecting sorghums for the post-rainy season is discussed.

Type
Research Article
Information
Experimental Agriculture , Volume 24 , Issue 1 , January 1988 , pp. 31 - 36
Copyright
Copyright © Cambridge University Press 1988

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References

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